Portable hot air heater



July 14, 1964 H. S. DRY

PORTABLE HOT AIR HEATER 2 Sheets-Sheet 1 A n 4 d d d d/Mtd d 6 INVENTOR.

Y m% m 7 m HAWW FIG. 2.

FIG. 2

Filed Jan. 17, 1963 July 14, 1964 H. s. DRY

PORTABLE HOT AIR HEATER 2 Sheets-Sheet 2 Filed Jan. 17, 1963 INVENTOR.

FIG 6.

HAL SMITH DRY rwwa i United States Patent 3,140,705 PORTABLE HOT AIR HEATER Hal Smith Dry, P.O. Box 427, Winters, Tex. Filed Jan. 17, 1963, Ser. No. 252,188 2 Claims. (Cl. 126-93) The present invention relates to portable heaters for use by sportsmen, fishermen, and others who have need for a small lightweight portable heater.

An object of the present invention is to provide a lightweight portable heater for use with solidified alcohol as a fuel, the heater being entirely safe to handle, one that is sturdily constructed and of great efliciency, and one which is economical to manufacture.

Another object of the present invention is to provide a portable heater for use with solidified alcohol as a fuel, the heater being safe to use in relatively close quarters such as a tent, fishing hut, or the like.

These and other objects and advantages of the present invention will be fully apparent from the following description when taken in connection with the annexed drawings, in which:

FIGURE 1 is an elevational View of the heater according to the present invention as viewed from the front,

FIGURE 2 is a view in section taken on the line 22 of FIGURE 1,

FIGURE 3 is an elevational view from the front with the door removed,

FIGURE 4 is a view taken on the line 44 of FIG- URE 2,

FIGURE 5 is a view taken on the line 55 of FIG- URE 2, and

FIGURE 6 is a fragmentary view in section of a modified form of the upper end portion of the heater of the present invention.

Referring in detail to the drawings in which like nu merals indicate like parts throughout the several views, the portable heater of the present invention comprises a horizontally disposed platform 10 adapted to support a can of solidified alcohol, as at 12 in FIGURES 2 and 3, the solidified alcohol being commercially available.

An outer shell designated generally by the reference numeral 14 extends about three sides of the platform 10 and includes a back wall 16 and opposed side walls 18 and 20.

A cap member 22 having a skirt 24 extending thereabout, extends over the top ends of the back wall 16 and side walls 18 and 20.

An upright openable and closable door 26 is connected by a hinge 28 at its upper end to the portion of the cap member skirt 24 opposite the back wall 16. The door 26 is provided with louvered sections 30 and 32.

A portion of the outer shell back wall 16 and portions of the outer shell side walls 18 and 20 extend below the platform 10 so as to raise the platform above any ground surface on which the outer shell rests.

An inner shell, designated generally by the numeral 34, rises from the platform 10 and is spaced from the outer shell 14. The inner shell 34 includes a back wall 36 and spaced side walls 38 and 40. A portion of the back wall 36 of the inner shell 34 is arcuately curved, as at 42, so as to deflect combustion gases and products away from the cap member 22.

In the form of the invention shown in FIGURE 6, the outer shell 14' is provided with a gas or combustion products deflector 44 depending from the cap member 22, the deflector 44 being substantially arcuately curved V-shaped.

In this form of the invention the back wall 16' is also provided with a louvered section 30, the door 26' also having a louvered section 30' as shown in FIGURE 6.

The platform 10 is provided with holes 46 for the ad- "Ice mission into the space above the platform 10 of air for combustion. Holes 48 are provided in the platform be tween the outer shell 14 and the inner shell 34, as at 48, for the admission of air to be heated.

Other holes are provided in the back wall 16 and the side walls 18 and 20, as at 50 in FIGURES 2 and 3, for the egress therethrough of heated air.

A U-shaped bail 52 has the ends of its legs anchored in holes provided in the outer shell 14 and the bail 52 serves as a handle by which the portable stove or heater of the present invention is carried.

In use, a can of solidified alcohol or other fuel is placed on the platform 10 and the cover is removed and the material therein is ignited by use of a match or other means. The door is lowered from its raised position and air will circulate through the louvered sections of the door as shown in FIGURES 2 and 3 by arrows while other air is admitted through the holes 46 in the platform and air is also admitted through the holes 48 into the space between the inner shell 14 and the outer shell 34. Such heated air exits through the holes 50 and the heat is reflected by either the curved surface of the portion 42 of the inner shell back wall 36 or by the V-shaped deflector 34.

When it is desired to stop the burning of the fuel in the can 12, it is only necessary to slide a cover or plate over the open upper end of the can 12 to extinguish the flame.

It will be seen therefore that the device of the present invention provides a portable stove for use by sportsmen, ice fishermen, or others who have need for a lightweight source of heat.

While only preferred forms of the invention have been shown and described other forms are contemplated and numerous changes and modifications may be made in the invention without departing from the spirit thereof as set forth in the appended claims.

What is claimed is:

l. A portable heater comprising a platform, an up right outer shell having a back wall and opposed side walls extending about three sides of said platform, a cap member extending over the upper ends of said back wall and said side walls, a vertically disposed openable and closeable door hingedly connected along the upper end thereof to the edge of said cap member opposite to said back wall, an inner shell having spaced side walls and a back wall rising from said platform in spaced relation with respect to said outer shell, the portion of said platform bounded by said inner shell side walls, said inner back wall, and said door being adapted to support a container of fuel, there being openings in said outer shell back wall and said outer shell side walls for egress of heated air, said platform being provided with holes opening into the space between said inner shell side walls and said inner shell back wall for ingress of combustion air, the portion of said platform between said inner shell wall and said outer shell walls being provided with openings for the ingress of air to be heated, said inner shell providing a closed conduit for air with said outer shell between the openings in said platform and the openings in said outer shell, said door being provided with upper and lower louvered sections, and means within said outer shell for deflecting combustion products away from said cap member, said inner shell providing with said door a vertical unobstructed conduit for heat between said louvered sections and between said platform and said deflecting means.

2. A portable heater comprising a platform, an upright outer shell having a back wall and opposed side walls extending about three sides of said platform, a cap member extending over the upper ends of said back wall and said side walls, a vertically disposed openable and closeable door hingedly connected along the upper end thereof to the edge of said cap member opposite to said back wall, an inner shell having spaced side walls and a back wall rising from said platform in spaced relation with respect to said outer shell, the portion of said platform bounded by said inner shell side walls, said inner back wall, and said door being adapted to support a container of fuel, there being openings in said outer shell back wall and said outer shell side walls for egress of heated air, said platform being provided with holes opening into the space between said inner shell side walls and said inner shell back wall for ingress of combustion air, the portion of said platform between said inner shell wall and said outer shell walls being provided with openings for the ingress of air to be heated, said inner shell providing a closed conduit for air with said outer shell between the openings in said platform and the openings in said outer shell, said door being provided with upper and lower louvered sections, the portion of said inner shell back wall adjacent the upper end curving forwardly and terminating at the upper end of said door, said inner shell providing with said door a vertical unobstructed conduit for heat between said upper and lower louvered sections and between the platform and said deflecting means.

References Cited in the file of this patent UNITED STATES PATENTS 1,703,900 Rowley Mar. 5, 1929 1,848,150 Becker Mar. 8, 1932 2,293,202 Gardner Aug. 18, 1942 2,304,707 Pollock Dec. 8, 1942 2,696,205 Ruhl Dec. 7, 1954 2,770,228 Nordholt et al Nov. 13, 1956 2,782,780 Bourner Feb. 26, 1957 FOREIGN PATENTS 100,864 Great Britain July 20, 1916 

1. A PORTABLE HEATER COMPRISING A PLATFORM, AN UPRIGHT OUTER SHELL HAVING A BACK WALL AND OPPOSED SIDE WALLS EXTENDING ABOUT THREE SIDES OF SAID PLATFORM, A CAP MEMBER EXTENDING OVER THE UPPER ENDS OF SAID BACK WALL AND SAID SIDE WALLS, A VERTICALLY DISPOSED OPENABLE AND CLOSEABLE DOOR HINGEDLY CONNECTED ALONG THE UPPER END THEREOF TO THE EDGE OF SAID CAP MEMBER OPPOSITE TO SAID BACK WALL, AN INNER SHELL HAVING SPACED SIDE WALLS AND A BACK WALL RISING FROM SAID PLATFORM IN SPACED RELATION WITH RESPECT TO SAID OUTER SHELL, THE PORTION OF SAID PLATFORM BOUNDED BY SAID INNER SHELL SIDE WALLS, SAID INNER BACK WALL, AND SAID DOOR BEING ADAPTED TO SUPPORT A CONTAINER OF FUEL, THERE BEING OPENINGS IN SAID OUTER SHELL BACK WALL AND SAID OUTER SHELL SIDE WALLS FOR EGRESS OF HEATED AIR, SAID PLATFORM BEING PROVIDED WITH HOLES OPENING INTO THE SPACE BETWEEN SAID INNER SHELL SIDE WALLS AND SAID INNER SHELL BACK WALL FOR INGRESS OF COMBUSTION AIR, THE PORTION OF SAID PLATFORM BETWEEN SAID INNER SHELL WALL AND SAID OUTER SHELL WALLS BEING PROVIDED WITH OPENINGS FOR THE INGRESS OF AIR TO BE HEATED, SAID INNER SHELL PROVIDED A CLOSED CONDUIT FOR AIR WITH SAID OUTER SHELL BETWEEN THE OPENINGS IN SAID PLATFORM AND THE OPENINGS IN SAID OUTER SHELL, SAID DOOR BEING PROVIDED WITH UPPER AND LOWER LOUVERED SECTIONS, AND MEANS WITHIN SAID OUTER SHELL FOR DEFLECTING COMBUSTION PRODUCTS AWAY FROM SAID CAP MEMBER, SAID INNER SHELL PROVIDING WITH SAID DOOR A VERTICAL UNOBSTRUCTED CONDUIT FOR HEAT BETWEEN SAID LOUVERED SECTIONS AND BETWEEN SAID PLATFORM AND SAID DEFLECTING MEANS. 